Foundation Repair Cost in St. Louis, MO 2026 Prices

St. Louis sits on Mississippi River alluvial deposits and loess soil that retain enormous amounts of water, creating persistent hydrostatic pressure against foundations. The city's extreme weather swings from humid 100-degree summers to frigid winters create damaging freeze-thaw cycles that crack and bow basement foundation walls. Many historic brick homes in Tower Grove, the Hill, and Soulard have stone or brick foundations from the late 1800s that require specialized restoration and underpinning. The limestone karst geology underlying the metro area creates occasional sinkholes and subsurface voids that can undermine foundations. Affordable labor and a competitive contractor market keep foundation repair costs well below the national average across the bi-state metro.

The average foundation repair project in St. Louis costs $4,500, which is 12% below the national average of $5,100. Most homeowners in the St. Louis metro area pay between $2,200 and $22,100, depending on the type of damage, repair method required, and foundation type.

The St. Louis market offers competitive pricing for foundation repair compared to coastal metros. This makes it an excellent time to address any foundation concerns, as early repairs prevent more costly structural damage down the road and protect your home's value.